Grain-separator.



E. P. BERGMAN.

GRAIN SEPABATOR.

APPLICATION 11.21) 111:0. 22, 1910 Patented May 23, 1911.

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WITNESSES:

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ERICK P. BERG-MAN, OF CHEROKEE, OKLAHOMA.

GRAIN-SEPARATOR.

Specification of Letters Patent.

Patented May 23, 1911.

Application filed December 22, 1910. Serial No. 598,750.

To all whom it may concern:

Beit known that I, ERICK P. BERGMAN, a citizen of the United States, anda resident of Cherokee, county of Alfalfa, and State of Oklahoma, haveinvented certain new and useful Improvements in Grain Separators, ofwhich the following is a specification.

My invention is an improvement in grain separators, and consists incertain novel con structions, and combinations of parts, hereinafterdescribed and claimed.

The object of the invention is to provide a mechanism for use withseparators using wind stackers, adapted to be arranged within thestacker for separating any grain that may remain from the straw, beforethe straw is delivered to the stack.

Referring to the drawings forming a part hereof, Figure 1 is alongitudinal vertical section of a portion of a stacker with theimprovement in place. Fig. 2 is aahorizontal longitudinal section. Fig.3is a transverse vertical section, and, Fig. 1 is an enlarged side viewof one of the separating devices.

The present embodiment of the invention is shown in connection with thestack 1 of a thresher or separator of any usual or desired constructlon.The stack is in the form of a tube, and the straw is forced through thetube by means of a fan delivering a blast of air through the tube.

More or less grain remains with the straw, and without the improvement,such grain falls on the stack and is lost. The improvement is designedto recover this grain, and the tube 1 is provided at its lower side witha recess 2, formed integral with the tube.

The repess is substantially semi-circular in cross section, and a pipeor chute 3 leads from the lower end of the recess, and delivers to theelevator of the separator, so that the grain may be cleaned and passedout of the machine. The separating device comprises a plurality ofscreens arranged transversely of the recess, and between the same andthe tube. The screens are alike, and but one will be described.

Each screen is composed of a plurality of sections, and each sectioncomprises a cross bar 4, provided with a plurality of laterallyextending fingers 5 and 6. The inner fingers 5 of each section arestraight, as shown in Figs. 2 and 3, while the outer fingers 6 arecurved longitudinally.

The fingers 6 of each section are arranged with their curve outward, andthe radius of the curve decreases toward the outermost fingers, as shownmore clearly in Fig. 3. The sections of each screen are symmetrical andthe sections are arranged with the cross bars in alinement. Thus thescreens fit the tube roughly, the fingers of each screen hav ing thegreatest curve being adjacent to the tube wall,

A shaft 7 is journaled transversely of the recess below each screen, andthe ends of each shaft extend through the walls of the recess. Eachshaft is arranged below the alined cross bars of the screen to which itbelongs, and is provided with a pair of spaced transversely perforatedlugs 8 at approximately the center of each cross bar.

An eye bolt 9 is passed transversely through each cross bar, and is heldin place by a pin 10, passing through the bolt. A washer 12 is arrangedbetween each pin and the cross bar, and each shaft 7 is provided at oneend, outside of the recess, with a crank arm 13. The eye of each bolt isreceived between the adjacent lugs 8 of the shaft, and a bolt 11 passesthrough the eye and lugs, to pivot the sections to the shaft.

Each shaft is provided with a forwardly extending arm 14 atapproximately its center, and the free end of the arm is slotted at 15.A link 16 connects each section of the adjacent screen with the arm 14.Each link is provided with an eye 17 at each end, one of which engagesan eye 18 on one of the inner fingers of the section, while the othereye engages the slot 15 of the arm.

A bar 19 connects the arms 13 of all of the shafts, and the bar isextended beyond the shafts at one end, and pivoted to a lever 25 at 20,intermediate the ends of the lever. One end of the lever is pivoted at21 on the tube, and the other end is provided with a handle 22. A tooth23 on the lever cooperates with a toothed sector or bar 24: on the tube,to hold the lever in adjusted position, and the tooth is operated by agrip 26.

By means of the lever the inclination of the screens with respect to thelongitudinal axis of the tube may be varied simultaneously, and all maybe held in adjusted position. The aggregate length of the screens issubstantially equal to the length of the recess, so that the recess isseparated from the tube by the screens.

In operation, the straw as it is thrown out through the tube, strikesthe fingers of the tube on account of its weight.

screens,and in movingover the, screens,

from one screen to the other, the said straw is agitated and shaken tobeat out the last grains. The said grains fall between the fingers intothe recess, and gravity carries them throughthe pipe 3 into the body ofthe separator.

The bar 19 is pivoted in a slot in the lever 25, to permit mot-ionbetween the parts.

A Considerable quantity of loose' or separated grain passes out with thestraw, and this grain moves along the bottom of the hen such grainreaches the recess, it passes through the screens and is returned withthat already mentioned. The elevator lifts the said grain and passes itthrough the cleaning de vices, thus recovering a considerable quantitythat would be otherwiselost.

It will be evident that many changes might be made in the constructionof the screens, and in their arrangement without departing from thespirit of the invention as pointed out in the appended claims.

If desired, screens similarto those shown in Fig. 3 may be placed at thetop of the tube, the said screens inclining downward and forward and thesaid screens may be adjusted in, the same manner as shown below. Thisconstruction is indicated in Fig. 1. The stacker may be also arranged totelescope if desired.

I claim:

1. In a grain separator, the combination with the stacking tube,provided with a recess in its under side extending longitudinally of thetube, a pipe leading from the lower end of the tube to the separator, aplurality of screens arranged transversely of the recess, one behind theother and separating the recess from the tube, each screen consisting ofa plurality of sections, each section comprising a cross bar anda'plurality of laterally extending fingers, the cross bars of thesections forming a screen being arranged in alinement transversely ofthe tube, the outermost fingers of each section being curved outwardly,a shaft journaled transversely of the recess below each pair of alinedcross bars, an eyebolt connected with each cross bar, a pivotalconnection between the eye of each eyebolt and the shaft, each of thesaid shafts having a central arm extending between'the sections andhaving a crank arm outside of the tube, a link connecting each sectionwith the central arm of the adjacent shaft, a bar connecting the arms, alever pivoted at one end on the tube and connected with the bar, andmeans for holding the bar in adjusted position;

2. In a grain separator, the combination with the stackingtube, providedwith a recess in its under side extending longitudinally of the tube, apipe leading from the lower end of the tube to the separator, aplurality. of screens arranged transversely of having a central armextending between the 1 sections and having a crank arm outside of thetube, a link connecting each section with the central arm of theadjacent shaft, a lever pivoted at one end on the tube and connect edwith the bar, and means for holding the bar in adjusted position.

3. In a grain separator, the'combination with the stacking tube providedwith an enlargement forming a recess in its under side extendinglongitudinally of the tube,

and a pipe leading from the recess to the body of the separator, of aplurality of screens arranged transversely of the tube between therecess and the tube and in alinement, each screen consisting of aplurality of sections, each section comprising a cross bar and laterallyextending spaced fingers, the cross bars of the sections of each screenbeing in alinement, a shaft journaled transversely of the recess beloweach screen, a pivotal connection between each cross bar and theadjacent shaft, each shaft having a lateral arm between the sections, alink connecting an inner finger of each sect-ion with the arm, eachshaft having a crank arm outside of the tube, a bar connecting the arms,means for moving the bar, and means for holding the bar in'adjustedposition.

4. In a grain separator, the combination with the stacking tube providedwith an enlargement forming a recess in its under side extendinglongitudinally of the tube, and a pipe leading from the recess to thebody of the separator, of a plurality of screensarranged transversely ofthe tube betiveen the bars of the sections of each screen being inalinement, a shaft journaled transversely of the recess below eachscreen, a pivotal connection between each cross bar and the adj acentshaft, each shaft having a lateral arm between the sections, a linkconnecting an inner finger of each section to the arm, and means forsimultaneously oscillating the shafts. V

5. In a grain separator, the combination with the stacking tube providedwith an enlargement forming "a recess in .its under side extendinglongitudinally of the tube, and a pipe leading from the recess to thebody of the separator, of a plurality of screens arranged transverselyof the tube, between the recess and the tube and in alinement, eachscreen consisting of a plurality of sections, each section comprising across bar and laterally extending spaced fingers, the cross bars of thesections of each screen being in alinement, a shaft journaledtransversely of the recess below each screen, a connection between eachsection and the adjacent shaft for swinging the section on the crossbar, means for simultaneously oscillating the shaft, and means forholding them in adjusted position.

6. In a grain separator, the combination with the stacking tube providedwith an enlargement forming a recess in its under side extendinglongitudinally of the tube, and a pipe leading from the recess to thebody of the separator, of a plurality of screens arranged transverselyof the tube between the recess and the tube and in alinement, eachscreen consisting of a plurality of sections, each section comprisin across bar and laterally extending spaced finger, the cross bars of thesections of each screen being in alinement, means for simultaneouslyswinging the sections of each screen on the cross bar to incline thefingers with respect to the longitudinal axis of the tube, and means forsimultaneously operating all of the said means.

7. In a grain separator, the combination with the stacking tube providedwith an enlargement formin a recess in its under side extending longituinally of the tube, and a pipe leading irom the recess to the body ofthe separator, of a plurality of screens arranged transversely of thetube between the recess and the tube and in alinement, each of thescreens comprising a plurality of 8. In a grain separator, thecombination a with the stacking tube provided with an enlargement formina recess in its under side extendin longitudinally of the tube, and apipe lea ing from the recess to the body of the separator, of aplurality of screens arranged transvcrsely of the tube between therecess and the tube, and in alinement, and means for simultaneouslymoving the said screens to cause them to take an inclined position withrespect to the longitudinal axis of the tube.

9. In a grain separator, the combination with the stacking tube providedwith an enlargement forming a recess in its under side extendinglongitudinally of the tube, and a pipe leading from the recess to thebody of the separator, of a plurality of screens arranged transverselyof the tube between the recess and the tube, and means for moving eachof the said screens to cause them to take an inclined position withrespect to the longitudinal axis of the tube.

10. In a grain separator, the combination with the stacking tube, of aplurality of screens arranged along the bottom thereof transversely ofthe tube, each screen comprising a plurality of spaced fingers extendinglongitudinally of the tube, a cross bar connecting the fingers, andmeans for simultaneously moving the screens to incline the fingers withrespect to the longitudinal axis of the tube.

ERICK P. BERGMAN.

Witnesses:

HAL CLARKE, VIRGIL W. I'IILL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

